1 files changed, 74 insertions, 0 deletions
diff --git a/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/task/util/editor/Position.java b/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/task/util/editor/Position.java
new file mode 100644
index 00000000000..c1e03a37a7d
--- /dev/null
+++ b/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/task/util/editor/Position.java
@@ -0,0 +1,74 @@
+// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.vespa.hosted.node.admin.task.util.editor;
+
+import javax.annotation.concurrent.Immutable;
+import java.util.Comparator;
+import java.util.Objects;
+
+/**
+ * Represents a position in the buffer
+ *
+ * @author hakon
+ */
+@Immutable
+public class Position implements Comparable<Position> {
+    private static final Position START_POSITION = new Position(0, 0);
+
+    private static final Comparator<Position> COMPARATOR = Comparator
+            .comparingInt((Position position) -> position.lineIndex())
+            .thenComparingInt((Position position) -> position.columnIndex());
+
+    private final int lineIndex;
+    private final int columnIndex;
+
+    /** Returns the first position at line index 0 and column index 0 */
+    public static Position start() {
+        return START_POSITION;
+    }
+
+    Position(int lineIndex, int columnIndex) {
+        this.lineIndex = lineIndex;
+        this.columnIndex = columnIndex;
+    }
+
+    public int lineIndex() {
+        return lineIndex;
+    }
+
+    public int columnIndex() {
+        return columnIndex;
+    }
+
+    @Override
+    public int compareTo(Position that) {
+        return COMPARATOR.compare(this, that);
+    }
+
+    public boolean isAfter(Position that) { return compareTo(that) > 0; }
+    public boolean isNotAfter(Position that) { return !isAfter(that); }
+    public boolean isBefore(Position that) { return compareTo(that) < 0; }
+    public boolean isNotBefore(Position that) { return !isBefore(that); }
+
+    public String coordinateString() {
+        return "(" + lineIndex + "," + columnIndex + ")";
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Position position = (Position) o;
+        return lineIndex == position.lineIndex &&
+                columnIndex == position.columnIndex;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(lineIndex, columnIndex);
+    }
+
+    @Override
+    public String toString() {
+        return coordinateString();
+    }
+}